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Keynote Address by Siegfried Linkwitz at ALMA International Winter Symposium, 2014.
Whatever_happened
Mr. Linkwitz acknowledges loudspeaker design (section 11) has progressed considerably in the past 50 years in terms of cone materials, spiders, surrounds, voice coils and magnets. But identifies 3 areas of loudspeaker design that remain "hurdles" to obtaining the highest quality in sound reproduction:
1 - Vented boxes. They introduce group delay distortion and color the bass.
2 – Passive crossover-equalizers. They decouple the power amplifier from the transducer and give up motion control. They interact with the transducer.
3 – Frequency dependent directivity. Box loudspeakers radiate omnidirectional at low frequencies and beam at high frequencies. They feed more energy at low frequencies into the room’s reverberant field than at high frequencies.
Whatever_happened
Mr. Linkwitz acknowledges loudspeaker design (section 11) has progressed considerably in the past 50 years in terms of cone materials, spiders, surrounds, voice coils and magnets. But identifies 3 areas of loudspeaker design that remain "hurdles" to obtaining the highest quality in sound reproduction:
1 - Vented boxes. They introduce group delay distortion and color the bass.
2 – Passive crossover-equalizers. They decouple the power amplifier from the transducer and give up motion control. They interact with the transducer.
3 – Frequency dependent directivity. Box loudspeakers radiate omnidirectional at low frequencies and beam at high frequencies. They feed more energy at low frequencies into the room’s reverberant field than at high frequencies.